paperinfoline.com - Units used in Paper Industry

List of Useful Parameters and their Units in Paper,
Printing & Packaging Industry

Parameter	Recommended	Parameter	Recommended
	Unit or method		Unit or method
	of expression		of expression

MECHANICAL PROPERTIES		Light absorption coefficient	m²/kg
Apparentbulk density	g/cm³	Light absorbing power	numerical value
Apparentsheet density	g/cm³	Light scattering power	numerical value
Bending stiffness	µm, mNm, Nm	Light scattering coefficient	m²/kg
Bending stiffness index	Nm²/kg²	Opacity	%
Box compression resistance BCT	kN	Reflectance factor	%
Breaking length	km	Reflection (optical) density	numerical value
Bulking thickness	µm	Transmission (optical) density	numerical value
Burst energy absorption	s/m²
Burst index	kPam²/g	SURFACE PROPERTIES
Bursting strength	kPa	Adhesion on strength of glue
Compression resistance SCT	kN/m	bonds of corrugated fibreboard	kn/m
Compression resistance SCT Index	kNm/kg	Air permeance	µm/(Pa.s)
Edgewise crush resistance	kN/m	Air resistance (Gurley)	s
Flat compression resistance	kPa	Friction	coefficient N/N
Flat compression resistance FCT		Ink absorbency "K and N"	"K and N" units
(corrugated board)	kPa	Picking velocity, IGT	m/s
Flat crush resistance of laboratory		Resistance to water penetration	min, h, d
fluted corrugated medium	N	Resistance to grease penetration	min, h, d
Fracture toughness	J/m	Roughness, Print-surf	µm
Fracture toughness index	Jm/kg	Roughness, Sheffield	m 1/min
Fold number, double folds	numeriacl value	Roughness, Bendtsen	m 1/min
Folding endurance	log10( number of	Smoothness, Bekk	s
	folds)	Water absorbency
Grammage	g/m²	*area basis	g/m²
Puncture resistance	J, kj
Ring crush	kN/m
Static bending force	mN, N	OTHERS
Stretch at break	%	Ash	%(mass/mass)
Tear index	mNm²/g	Conductivity of extracts	mS/m
Tearing strength	N	Dimensional change after
Tensile index	Nm/g	immersion in water	%
Tensile energy absorption	J/m²	Dint and shives in pulps	10² (number of
Tensile stiffness	N/m		spocks)/kg
Tensile stiffness index	Nm/kg	Drainability of pulp "CSF"
Tensile stiffness orientation	*(degree with	and Schopper-Riegler	numerical value
	decimalsub-	Electric strength	kV/mm
	divisions)	Hygroexpansivity	%
Tensile strength	kN/m	Moisture content or dry matter
Tensile toughness Index	Jm/kg	content	%(mass/mass)
Tensile toughness	J/m	Stock concentration	%
Thickness	µm, mm	Swelling after water immersion	%
z-direction strength properties	kN/m²	Surface resistivity	Ώ
		Volume resistivity	Ώ .m
		Water absorbency
OPTICAL PROPERTIES		*mass basis	%
Gloss	% or numerical	*capillary rise	mm
	value	Water vapour transmission rate	g(m², d)

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